Okay, it’s not exactly an in-joke, or hidden for that matter, but there is a large overlap between the casts of the two shows. Gilligan famously cast Bryan Cranston in his meth epic after directing him in X-Files episode Drive, but many people Mulder and Scully encountered ended up becoming Breaking Badders: Dean Norris is a US Marshal in F. Emasculata, Aaron Paul a TV show host in Lord Of The Flies, and there are almost ten other X-veterans, including Raymond Cruz and Danny Trejo.